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Numerical Study of Combined Radiation and Turbulent Mixed Convection Heat Transfer in a Compartment Containing Participating Media

Published online by Cambridge University Press:  11 August 2015

A. Asghari ,
S. A. Gandjalikhan Nassab  and
A. B. Ansari
A. Asghari*
Affiliation:
Department of Mechanical Engineering, School of Engineering, Shahid Bahonar University Kerman, Iran
S. A. Gandjalikhan Nassab
Affiliation:
Department of Mechanical Engineering, School of Engineering, Shahid Bahonar University Kerman, Iran
A. B. Ansari
Affiliation:
Department of Mechanical Engineering, University of Tehran, Tehran, Iran
*
* Corresponding author (amir.asghari.62@gmail.com)
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Abstract

The effect of radiation on turbulent mixed convection flow, generated by two plane wall jets with different temperatures inside a cavity was studied numerically. The medium is treated as a gray, absorbing, emitting and scattering. The two-dimensional Reynolds-average Navier-Stokes equations, coupled with the energy equation are solved by using the computational fluid dynamic (CFD) techniques, while the AKN low-Reynolds-number model is employed for computation of turbulence fluctuations. The Boussinesq approximation is used to calculate the buoyancy term, and the radiation part of the problem is solved by numerical solution of the radiative transfer equation (RTE) with the well known discrete ordinate method (DOM). The governing equations are discretized by the finite volume technique into algebraic equations and solved with the SIMPLE algorithm. The effects of radiation conduction parameter, scattering albedo, optical thickness and Richardson number on the thermal behavior of the system are carried out. Results show that the gas radiation has a significant effect on the temperature distribution inside the turbulent mixed convection flow.

Keywords

Plane wall jetsTurbulent mixed convection flowRadiation heat transferDiscrete ordinate method
Type
Research Article
Information
Journal of Mechanics , Volume 31 , Issue 4 , August 2015 , pp. 467 - 480
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2015 

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